pub fn channel<T: Send + Sync>() -> (Sender<T>, Receiver<T>)Expand description
Creates a channel returning a Sender and Receiver structs (mpsc: multiple producer single consumer).
Examples found in repository?
examples/messages.rs (line 23)
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35
fn main() {
let app = app::App::default();
let mut wind = Window::default().with_size(400, 300);
let mut frame = Frame::default().size_of(&wind).with_label("0");
let mut val = 0;
wind.show();
let (s, r) = app::channel::<Message>();
std::thread::spawn(move || loop {
app::sleep(1.);
s.send(Message::Increment(2));
});
while app.wait() {
if let Some(Message::Increment(step)) = r.recv() {
inc_frame(&mut frame, &mut val, step)
}
}
}More examples
examples/counter2.rs (line 22)
9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
fn main() -> Result<(), Box<dyn std::error::Error>> {
let app = app::App::default();
let mut wind = Window::default().with_size(160, 200).with_label("Counter");
let mut flex = Flex::default_fill().column();
flex.set_margins(30, 40, 30, 40);
flex.set_pad(10);
let mut but_inc = Button::default().with_label("+");
let mut frame = Frame::default().with_label("0");
let mut but_dec = Button::default().with_label("-");
flex.end();
wind.end();
wind.show();
let (s, r) = app::channel::<Message>();
but_inc.emit(s, Message::Increment);
but_dec.emit(s, Message::Decrement);
while app.wait() {
let label: i32 = frame.label().parse()?;
if let Some(msg) = r.recv() {
match msg {
Message::Increment => frame.set_label(&(label + 1).to_string()),
Message::Decrement => frame.set_label(&(label - 1).to_string()),
}
}
}
Ok(())
}examples/temp_converter2.rs (line 40)
37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
pub fn new() -> Self {
let a = app::App::default();
MyApp::init_styles();
let (s, r) = app::channel();
let (inp1, inp2) = {
let mut win = window::Window::default().with_size(150, 200);
let mut flex = group::Flex::default()
.with_size(130, 180)
.center_of(&win)
.column();
make_label("Celcius");
let mut inp1 = input::FloatInput::default().with_size(0, 40);
make_label("Fahrenheit");
let mut inp2 = input::FloatInput::default().with_size(0, 40);
flex.fixed(&inp1, 30);
flex.fixed(&inp2, 30);
flex.end();
win.end();
win.make_resizable(true);
win.show();
inp1.set_value(&format!("{}", 0.0));
inp2.set_value(&format!("{}", 32.0));
inp1.set_trigger(CallbackTrigger::Changed);
inp2.set_trigger(CallbackTrigger::Changed);
inp1.emit(s, Message::CelciusChanged);
inp2.emit(s, Message::FahrenheitChanged);
(inp1, inp2)
};
Self { a, inp1, inp2, r }
}examples/closable_tabs2.rs (line 172)
152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196
fn main() {
use fltk::{prelude::*, *};
// Create groups to be used as content for tabs
pub fn create_tab(from: i32, to: i32) -> group::Group {
let grp = group::Group::new(0, 0, 800, 600, None);
for idx in from..to {
button::Button::new(
idx * 10 + (idx - from) * 42,
idx * 10 + (idx - from) * 42,
80,
40,
None,
)
.with_label(&format!("button {idx}"));
}
grp.end();
grp
}
let app = app::App::default();
let mut win = window::Window::default().with_size(800, 600);
let (s, r) = app::channel::<closable_tab::Message>();
let mut tabs = closable_tab::ClosableTab::new(0, 0, 800, 600, &s);
win.end();
win.show();
tabs.add(&mut create_tab(1, 3), "tab 1");
tabs.add(&mut create_tab(4, 7), "tab 2");
tabs.add(&mut create_tab(8, 11), "tab 3");
tabs.add(&mut create_tab(12, 15), "tab 4");
tabs.add(&mut create_tab(16, 22), "tab 5");
tabs.set_foreground(2);
while app.wait() {
use closable_tab::Message::*;
if let Some(msg) = r.recv() {
match msg {
Foreground(idx) => {
tabs.set_foreground(idx);
}
Delete(idx) => {
tabs.remove(idx);
}
InsertNew(_) => {}
}
}
}
}examples/threads_windows.rs (line 37)
17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84
fn main() -> Result<(), Box<dyn std::error::Error>> {
let app = app::App::default();
let mut wind = Window::default().with_size(160, 200).with_label("Counter");
let mut col = Flex::default()
.with_size(120, 140)
.center_of(&wind)
.column();
col.set_spacing(10);
let mut but_inc = Button::default().with_label("+");
let mut frame = Frame::default().with_label("0");
let mut but_dec = Button::default().with_label("-");
col.end();
wind.end();
wind.show();
let mut msg_wind = Window::default().with_size(120, 100).with_label("Message");
let mut msgview = HelpView::default().with_size(120, 100);
msgview.set_align(Align::Center);
msg_wind.end();
let (s, r) = app::channel::<Message>();
but_inc.set_callback({
move |_| {
s.send(Message::Deactivate);
thread::spawn(move || {
thread::sleep(Duration::from_secs(1));
s.send(Message::Increment);
s.send(Message::Message("Incremented"));
s.send(Message::Activate);
});
}
});
but_dec.set_callback({
move |_| {
s.send(Message::Deactivate);
thread::spawn(move || {
thread::sleep(Duration::from_secs(1));
s.send(Message::Decrement);
s.send(Message::Message("Decremented"));
s.send(Message::Activate);
});
}
});
while app.wait() {
if let Some(msg) = r.recv() {
let label: i32 = frame.label().parse()?;
match msg {
Message::Increment => frame.set_label(&(label + 1).to_string()),
Message::Decrement => frame.set_label(&(label - 1).to_string()),
Message::Activate => {
but_inc.activate();
but_dec.activate();
}
Message::Deactivate => {
but_inc.deactivate();
but_dec.deactivate();
}
Message::Message(s) => {
msgview.set_value(s);
msg_wind.show();
}
}
}
}
Ok(())
}examples/editor2.rs (line 181)
178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292
pub fn new(args: Vec<String>) -> Self {
let app = app::App::default().with_scheme(app::Scheme::Gtk);
app::background(211, 211, 211);
let (s, r) = app::channel::<Message>();
let mut buf = text::TextBuffer::default();
buf.set_tab_distance(4);
let mut main_win = window::Window::default()
.with_size(800, 600)
.center_screen()
.with_label("RustyEd");
let menu = MyMenu::new(&s);
let modified = false;
menu.menu.find_item("&File/Save\t").unwrap().deactivate();
let mut editor = MyEditor::new(buf.clone());
editor.emit(s, Message::Changed);
main_win.make_resizable(true);
// only resize editor, not the menu bar
main_win.resizable(&*editor);
main_win.end();
main_win.show();
main_win.set_callback(move |_| {
if app::event() == Event::Close {
s.send(Message::Quit);
}
});
let filename = if args.len() > 1 {
let file = path::Path::new(&args[1]);
assert!(
file.exists() && file.is_file(),
"An error occurred while opening the file!"
);
match buf.load_file(&args[1]) {
Ok(_) => Some(PathBuf::from(args[1].clone())),
Err(e) => {
dialog::alert(
center().0 - 200,
center().1 - 100,
&format!("An issue occured while loading the file: {e}"),
);
None
}
}
} else {
None
};
// Handle drag and drop
editor.handle({
let mut dnd = false;
let mut released = false;
let buf = buf.clone();
move |_, ev| match ev {
Event::DndEnter => {
dnd = true;
true
}
Event::DndDrag => true,
Event::DndRelease => {
released = true;
true
}
Event::Paste => {
if dnd && released {
let path = app::event_text();
let path = path.trim();
let path = path.replace("file://", "");
let path = std::path::PathBuf::from(&path);
if path.exists() {
// we use a timeout to avoid pasting the path into the buffer
app::add_timeout3(0.0, {
let mut buf = buf.clone();
move |_| match buf.load_file(&path) {
Ok(_) => (),
Err(e) => dialog::alert(
center().0 - 200,
center().1 - 100,
&format!("An issue occured while loading the file: {e}"),
),
}
});
}
dnd = false;
released = false;
true
} else {
false
}
}
Event::DndLeave => {
dnd = false;
released = false;
true
}
_ => false,
}
});
// What shows when we attempt to print
let mut printable = text::TextDisplay::default();
printable.set_frame(FrameType::NoBox);
printable.set_scrollbar_size(0);
printable.set_buffer(Some(buf.clone()));
Self {
app,
modified,
filename,
r,
main_win,
menu,
buf,
editor,
printable,
}
}Additional examples can be found in: